Perhaps you should try some spelling variations:
"research written papers" » "research write papers", "research within papers", "research writing papers", "research written paper", "research written patterns"
"research white paper" » "research while paper", "research write paper", "research what paper"
"research gate paper" » "research gated paper", "research game paper", "research kate paper", "research late paper", "research waste paper", "research late papers"

You may be able to get more results by adjusting your search query.

• If you are trying to use Boolean operators, they must be ALL CAPS: (((("research white paper") OR ("research written papers"))) OR ("research gate paper")).
• Removing quotes may allow a broader search: (((( research white paper ) or ( research written papers ))) or ( research gate paper )).
• Adding a wildcard symbol may retrieve word variants: (((("research white paper") or ("research written papers"))) or ("research gate paper"))*.